Induction-valve for internal-combustion engines.



No. 883,340. PATENTED MAR. 31, 1908.

R. E. PHILLIPS. INDUCTION VALVE FOR INTERNAL COMBUSTION ENGINES.

APPLIGATION FILED APR-22,1904.

3 SHEETS-SHEET 1.

FIG.|.

w'ITNEssEs: INVENTQR.

PATBNTED MAR. 31, 1908. E" PHILLIPS.

INDUCTION VALVE FGK IEITYERNAL COMBUSTION ENGINES.

APILIGATION 'IILBD M122, 1904, v

3 $HEETS-SEEET INVENTOR- WITNESSES:

"Jmsamw. PATENTED MAR. 31, 1908. L. E. PHILLIPS. INDUCTION VALVE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED APR.22,1904.

3 SHEETS-SHEET 3.

wlTNEsESEs; I'NVENTPR.

Bonner E. PHI IPS; or WESTMINSTER, LONDON, ENGLAND.

' IiTbUC TION-VALVE"FORINTEItiIAL-GOMBUSTION ENGINES.

Specification (if- Letters Patent. Patented March 31, 1908.

'iip ii m i filed April 22,1904. Serial No; 20am.

UT all who limit mag [concerni- LHfS, a subject of-the King .of' Great Britain" and Ireland, residing at-30 Georgestreet,.

Be it knownthat I, ROBERT EDWARD PruniHanoverSqua're, in the city Of-WQSillIllIiStBI,

in the county of London, England,- have invented a new and usefullmprovement'in In-f duction-Valves for Internal-Combustion Endate the 22d day ine's, (for which Ihave applied :forfLetterS.-

atent in Great Britain, No. 9,097, bearing 7 of April, 1903;), andI do hereby declare't e following, when taken in connection with the accompanying drawings and the' letters of reference markedtherjeo'n,

to be a full, clear, and'ex'act description of the same, and which said'drawings consti inelevation-phr tly 1n. secti n.,showing an tute part of" this specification, and represent Figure 1 a. view in elevation-part1 ,in 'sectionTshowing an arrangement in which the valve opens by gravity. Fig.2 is aview I arrangement in which the valve opens by a s ring action.

e evation and plan respectively showing the application of this invention to an engine with four cylinders em loying' but four cams and fourstrikers or li tersfor operating the Whole of the induction and exhaust valves. 5 is azsection al view of the connection'of the valve stem with plunger shown in Fig. 2.

Throughout the views similar parts are markedwith like letters of reference.

This invention relates to internal combustion or explosion'engines of the Otto or four-cycle type, and consists of'improved lnductlon valve operating mechanlsrn whereautomatica 0.

by the supply valve is permittedto open 'i. 2., withouti any assistance due to the difference-of pressure in the inlet pipe and cylinder respectively due to' the {suction stroke of the piston, and 'is closed positively by mechanical means, the object I eing to combine the good and eliminate the [bad points of both the atmospheric and the .mechanically-operated valve. I

According to tl 's invention the-induction.

valve, which is of the lift type, is so arranged that it will leave its seat automatieall as soon as the pressure in the cylinder fal s to the pressure in the induction pi e, without any assistance either mechanics ly-or from the suction stroke of the piston. The valve is retained on its "seat by a spring strongenough to insure its positive closing and to prevent itsbeing opened during the suction- Figs; '3 and '{1 are views in stroke of the piston. pressure of this spring is removed from the valve in advance of the time it is-dueto' 0 en, and is restored to it to cause it to close, y suitable mechan ical means, such, for instance, as that usually employed in mechanicall -o erated valves, vizz, {by}; can' on the hali -motion. shaft. Owing to the pressure .inthe cylinder during the exhaust stroke of the iston, the valve 1; e exhaust gases in the cy ind'er alone, and consequently it is freeto open automatically immediately the pressure in the c. linder falls to that in the induction pipe.

the strength of which is but slightly more than sufiicie-nt to balance the weight of the valve is employed to lift it; Referring to Fig 1. The induction valve A is fitted in a valve casing B to which the sup ly conduit i attached, which casing is re 'erably removable from the cylinder wall Y and carries the induction valve A and seat therefor, and is provided with a long boss 6 for the stem a to pass through so as to insure its bein efficiently guided. In the upper part of the casin B is fitted a hollow plunger adapted to sli e in the said casing without frictional contact with the stem a of the valve. This is important as any friction between the plunger and the stem of-thevalve would tend to 0 en said valve when; the pressure in-the cy ind'er is low due to throti is'r'etained on its seat after t re ressureof the I'lllglS removed from it b i t 'e' pressureof or the v same reasonit ,lS immaterial within certa n tling on the supply ofmixture to the engine.

upper end of the plunger Cis recessed to re-- ceive the cotter, The necessary motion for operating the plungefC may be taken from any suitable part of the motor, preferably from a cam on the halfnnotion shaft carryin the cams for operating the exhaust valve, the'said motion being transmitted to oss b is as ri'n D whichjop the plunger C through a connecting rod or In the construction shown by Fig. 2 the' plunger C is formed in one with the striker G contacting the cam H on the half-motion shaft K, the plunger engaging a collar a through which the pressure of the spring D operates to retain the valve A on its seat, the end of the plunger having a recess c to. receive the end of the stem a of the valve and a-transverse slot 0 to clear the cotter a.

VVhenthe valve is arranged to open upwards as shown in Fig. 2, a light spring, such as L, acting between the plunger 0 and the stem of the-valve, is employed to slightly more thanbalance the weight of the valve.

To force the valve from its seat in case it should become stuckup from any cause, and thereby not have opened automatically, the plunger O is arranged to contact the stem of the valve either directly or indirectly at a 5 time subsequent to the time the said valve should have 0 'ened automatically. In the construction s own in Fig. 1, this end is attained by making the clearance between the top of the cotter a, and the under side of the cap c'of the plunger C less than the total movement of the engaging end of the lever E. In the construction shown by Fig. 2, the

same end is attained by making the clearance between the end of the stem a of the 5 valve and the bottom of the recess 0 in the plunger C less than the total movement of the end of said lever.

When the admission valve is arranged to open downwards as shown by Fig. 1, a light 40 spring, such as M,'may be employed to break t e fall of the-valve on. o ening. To vary the lift of the valve for regu ating purposes, a

device such as the'bell-crank lever as shown in Fig. 1, may be employed to vary the 5 amount the valve shall 0 en. As all that is necessary in this metho of operating inlet valves is that the pressure of the spring on the valve should be removed from the valve in advance of the time at which the valve 5 should open, the shape of the cam for operating the said spring is of secondary importance, and the same cam that o crates the exhaust valve may be employed or the purpose of obtaining the necessary motion to operate the spring of the induction valve. In engines with single or double cylinders this may conveniently be done by taking the motion from the exhaust cam. at an angle of 90 from the point at which the motion is taken for o crating the exhaust valve. In engines with four cylinders themotion for o crating the admission valve can be taken direct from the lifters 0r strikers O o erating the exhaust valves, as shown in Figs. 3

5 and 4, by mounting cross-heads P on the said lifters or strikers so that they can engage both the stems It of the exhaust valves and the rods or links F operating the s rings of the inlet valves through the rocking evers E. In the arrangement illustrated the cylinders are set to operateby way of exam. lein the following order:]., 2, 4, 2 :-so t at the-- exhaust cam'of No. 1 cylinder opera es the inlet valve of No. 2 cylinder, the exhaust cam of No. 2 cylinder the inlet valve of No. 4 cyl inder, the exhaust cam of No. 3 cylinder the inlet valve of No. 1 cylinder, and theexhaust cam ofNo.4 cylinder the inlet valve of N o. 3 cylinder; It will be seen that this arrangement materially reduces the number 59 of working parts as it enables the whole of the eight valves to be operated by four cams and four lifters or strikers.

I claim 1. In induction valve mechanism for in ternal combustion or explosion engines of the four-cycle ty e, a valve casing carryin an induction va ve and seat therefor an aving a guide for the stem of the valve, a projection on the valve stem, a hollow g plunger sliding in the casing and ada ,tedto.

engage the said rejection and t rough which the stem of the valve passes, a spring between the casing and the plunger acting to retain the valve in its closed position, and mechanical means for depressing the plun er to compress the spring and thus relieve t is valve of its pressure. j 2. In induction valve mechanism for internal combustion or explosion engines of the four-cycle type, a' valve casing carrying an induction valve and seat therefor-and having a guide for the stem of the valve, a

projection on the valve stem, a hollow plunger sliding in the casing and encirclingp but not in frictional contact with the stem" of the valve, said'plunger being adapted to engage the projection on the valve stem, a

s ring operating between the casing and the r p unger to retain the valve in its closed position, and mechanical means for depressing the plunger to compress the spring' and thus relieve the valve of its pressure.

3. In induction valve mechanism for in ternal combustion or explosion engines of 5 the four-cycle type, a valve casing carryin an induction valve and seat therefor, and forming a guide for the stem of the valve, a projection on the valve stem, a hollow plunger sliding in the said casing and encir- 130 cling but not in frictional contact with the valve stem and adapted to engage the said projection, a spring operating between the casing and the plunger, and a rocking member for operating the plunger.

4. In induction valve mechanism for internal combustion or explosion engines of the four-cycle type, a valve casing carrying an induction valve and seat therefor, the stem of the said valve having a projection, a 130 hollow plunger adapted to engage the said projection and sliding in the casing and through which the stem ol the valve passes,

a spring operating between the casing and.

the plunger, and means to depress the plunger to thereby relieve the valve from the action of the spring.

5. in an internal combustion or explosion engine of the lour-c vcle type, the combination with an induction valve of the lift type arranged to open downwards, ot a spring acting between the stem ol the valve and its seat to retain said valve in its closed position, means for removing the pressure of said spring from said valve so that it. is free to open by gravity, a sprinq adapted to break the tall ol: the valve on opening, and means for restoring the pressure of the clos ing spring to the valve.

6. In an internal combustion or explosion engine of the tour-eycle type, the combina tion with an induction valve of the lift type, of a closing spring acting between. the stem of said valve and its easing, and operating to seat, means for retain the valve upon its thereby remove.

compress-in; the spring; to the pressure ol said spring from said alve, means ii'ulepemleut of the valve o 'ierating mechanism of the engine for varying the amountsaid valve opens, and means for restoring toe said pressure ot said spring to said valve.

7. in an mternal combustion or explosion engii'ie ot' the four-cycle t vpe, the combination with the induction valve A, of the removable-valve easing B for said valve, the hollow plunger (7 sliding in the casing B and passing over the stem a of the valve A with out frictional contact, the projection on the stem ot'the valve with which the upper end. of the plunger engages, the spring 1) acting between the casing B of the valve and the plunger C to retain said. valve on its casing, and the means for operating said plunger to remove the pressure of said spring from and restore it to said valve.

8. In an internal combustion or explosion engine of the founcycle type the combination. with the induction valve A, of the valve casing B for said valve, the hollow plunger C sliding in the casing B and passing over the the said plunger to remove the pressure of the tion with the induction valve A, of the valve casing B for said valve, the hollow plunger 0 sliding in the casing B and passing over the stem a of the valve A Without frictional contact, the project-ion on the stem of the valve with which the upper end of the plunger engages, the spring D acting between the plunger and the casing B to retain the valve on said casing, the means for operating the said plunger to remove the pressure of thespring from and restore it to said valve, the spring M encircling the stem of the valve and arranged to break the fall of said valve, and the device N for regulating the amount the said valve A opens.

'10. In an'internal combustion or explosion engine of the four-cycle type, the combination with the induction valve A, of the valve casing B for said valve, the hollow plunger C sliding in the casing B and passing over the stem a of the valve A without frictional contact, the. projcctionon the. stem of the valve with which the upper end of the plunger engages, the spring D acting between the plunger C and the casing B to retain the valve on said casing, the means for operating the said plunger to remove the pressure of the spring from and restore it to said valve, and the means for mechanically forcing saidvalve from its casing in case it does not open automatically.

11. In 'aninternal combustion or explosion engine of the four-cycle type, the com bination with the induction valve A, of the valve casing B for-said valve, the hollow plunger C sliding in the casing B and through which the stem (1. of the valve A passes with out frictional contact, the projection on the stem of the valve with which the upper end ot the plunger engages, the ring D acting between the plunger L and tie casing B to retain said valve on said casing, the means 5 for operating the said plunger to remove the pressure of said spring from and restore it to said valve, the spring Bil-for breaking the fall of the valve, and the means for mechanically itorcing said valve trom lts seat in case, it does not open automatically.

ROBERT E. PHILLIBQ.

Witnesses:

Hnnuzv J. I-Lumor. G. V. SYMES. 

